I have 6 sites that have active queuing for VoIP traffic on the Qwest VPN network. ( and 100 or so others that don't )
I have heard good things about the quality , to the point that they are starting to request other sites have this as well. I configured it for LLQ on the interface, and required that they send their voice traffic with the DSCP already set. I guess I could have done it for them, but if they have the ability to mark the traffic, I let the Voice Switches do it. I believe that I used a priority of 128k for the Voice Queue, and matched that via a bandwidth statement on the class default. It depends on the amount of data that you are going to have going between sites, and the compression that you use. I'm being told that they are using 729a, but that's just what I'm told. If jitter is the problem , LLQ should fix it as the variance is most likely caused by your routers. I say this knowing that with the loss of customers, the VPN has plenty of spare bandwidth to use :) Thanks Larry -----Original Message----- From: dj [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 21, 2002 10:18 AM To: [EMAIL PROTECTED] Subject: VoIP over Qwest VPN WAN backbone [7:51837] Has anyone deployed VoIP successfully across Qwest's WAN backbone? I have 2 sites connected over Qwest's VPN service (consists of running IPSec over Qwest's MPLS backbone). Qwest says they currently have no QOS support in backbone, but the backbone has huge capacity (OC-192 pipes), which Qwest asserts should support VoIP apps. Round trip ping times across the WAN are typically 50 msec. I have the traditional VoIP problem of excessive jitter causing poor voice quality. Currently have 2621 routers at each site running WFQ wth Voice packets marked with IP precedence 5 for voice data, and IP precedence 3 for voice control. I am considering re-configuring the routers to run PQ-CBWFQ. If anyone has successfully got VoIP running successfully across this Qwest's backbone, I would be interested in hearing your approach and which config worked. Even though the Qwest WAN has huge capacity, but no QOS support, can it really support real-time apps like VoIP??? thanks, dj FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51843&t=51837 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
